diff --git a/po/en.po b/po/en.po
index 775e323..db6c907 100644
--- a/po/en.po
+++ b/po/en.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: xllmnrd 4-alpha.2\n"
 "Report-Msgid-Bugs-To: <https://bitbucket.org/kazssym/xllmnrd/issues/new>\n"
-"POT-Creation-Date: 2020-07-09 22:59+0900\n"
+"POT-Creation-Date: 2020-07-10 19:21+0900\n"
 "PO-Revision-Date: 2020-07-08 20:09+0900\n"
 "Last-Translator: Kaz Nishimura\n"
 "Language-Team: none\n"
@@ -16,47 +16,47 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: xllmnrd/xllmnrd.cpp:255
+#: xllmnrd/xllmnrd.cpp:289
 #, c-format
 msgid "Try '%s --help' for more information.\n"
 msgstr "Try ‘%s --help’ for more information.\n"
 
-#: xllmnrd/xllmnrd.cpp:266
+#: xllmnrd/xllmnrd.cpp:300
 #, c-format
 msgid "Usage: %s [OPTION]...\n"
 msgstr "Usage: %s [OPTION]...\n"
 
-#: xllmnrd/xllmnrd.cpp:267
+#: xllmnrd/xllmnrd.cpp:301
 #, c-format
 msgid "Respond to IPv6 LLMNR queries.\n"
 msgstr "Respond to IPv6 LLMNR queries.\n"
 
-#: xllmnrd/xllmnrd.cpp:269
+#: xllmnrd/xllmnrd.cpp:303
 msgid "run in foreground"
 msgstr "run in foreground"
 
-#: xllmnrd/xllmnrd.cpp:270
+#: xllmnrd/xllmnrd.cpp:304
 msgid "record the process ID in FILE"
 msgstr "record the process ID in FILE"
 
-#: xllmnrd/xllmnrd.cpp:271
+#: xllmnrd/xllmnrd.cpp:305
 msgid "display this help and exit"
 msgstr "display this help and exit"
 
-#: xllmnrd/xllmnrd.cpp:272
+#: xllmnrd/xllmnrd.cpp:306
 msgid "output version information and exit"
 msgstr "output version information and exit"
 
-#: xllmnrd/xllmnrd.cpp:274
+#: xllmnrd/xllmnrd.cpp:308
 #, c-format
 msgid "Report bugs to <%s>.\n"
 msgstr "Report bugs to <%s>.\n"
 
-#: xllmnrd/xllmnrd.cpp:280
+#: xllmnrd/xllmnrd.cpp:314
 msgid "(C)"
 msgstr "©"
 
-#: xllmnrd/xllmnrd.cpp:281
+#: xllmnrd/xllmnrd.cpp:315
 #, c-format
 msgid ""
 "This is free software: you are free to change and redistribute it.\n"
diff --git a/po/ja.po b/po/ja.po
index 472a385..c57e8a8 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -9,7 +9,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: xllmnrd 3.0\n"
 "Report-Msgid-Bugs-To: <https://bitbucket.org/kazssym/xllmnrd/issues/new>\n"
-"POT-Creation-Date: 2020-07-09 22:59+0900\n"
+"POT-Creation-Date: 2020-07-10 19:21+0900\n"
 "PO-Revision-Date: 2020-07-08 11:50+0000\n"
 "Last-Translator: Kaz Nishimura <kazssym@linuxfront.com>\n"
 "Language-Team: Japanese (http://www.transifex.com/vx68k/xllmnrd/language/"
@@ -20,47 +20,47 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=1; plural=0;\n"
 
-#: xllmnrd/xllmnrd.cpp:255
+#: xllmnrd/xllmnrd.cpp:289
 #, c-format
 msgid "Try '%s --help' for more information.\n"
 msgstr "詳しくは ‘%s --help’ をお試しください。\n"
 
-#: xllmnrd/xllmnrd.cpp:266
+#: xllmnrd/xllmnrd.cpp:300
 #, c-format
 msgid "Usage: %s [OPTION]...\n"
 msgstr "使用法: %s [OPTION]...\n"
 
-#: xllmnrd/xllmnrd.cpp:267
+#: xllmnrd/xllmnrd.cpp:301
 #, c-format
 msgid "Respond to IPv6 LLMNR queries.\n"
 msgstr "IPv6 LLMNR クエリに応答します。\n"
 
-#: xllmnrd/xllmnrd.cpp:269
+#: xllmnrd/xllmnrd.cpp:303
 msgid "run in foreground"
 msgstr "フォアグラウンドで実行"
 
-#: xllmnrd/xllmnrd.cpp:270
+#: xllmnrd/xllmnrd.cpp:304
 msgid "record the process ID in FILE"
 msgstr "プロセス ID を FILE に記録"
 
-#: xllmnrd/xllmnrd.cpp:271
+#: xllmnrd/xllmnrd.cpp:305
 msgid "display this help and exit"
 msgstr "このヘルプを表示して終了"
 
-#: xllmnrd/xllmnrd.cpp:272
+#: xllmnrd/xllmnrd.cpp:306
 msgid "output version information and exit"
 msgstr "バージョン情報を出力して終了"
 
-#: xllmnrd/xllmnrd.cpp:274
+#: xllmnrd/xllmnrd.cpp:308
 #, c-format
 msgid "Report bugs to <%s>.\n"
 msgstr "バグ レポートは <%s> まで。\n"
 
-#: xllmnrd/xllmnrd.cpp:280
+#: xllmnrd/xllmnrd.cpp:314
 msgid "(C)"
 msgstr "©"
 
-#: xllmnrd/xllmnrd.cpp:281
+#: xllmnrd/xllmnrd.cpp:315
 #, c-format
 msgid ""
 "This is free software: you are free to change and redistribute it.\n"
diff --git a/po/xllmnrd.pot b/po/xllmnrd.pot
index bbbbf70..faeebd3 100644
--- a/po/xllmnrd.pot
+++ b/po/xllmnrd.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: xllmnrd 4-alpha.2\n"
 "Report-Msgid-Bugs-To: <https://bitbucket.org/kazssym/xllmnrd/issues/new>\n"
-"POT-Creation-Date: 2020-07-09 22:59+0900\n"
+"POT-Creation-Date: 2020-07-10 19:21+0900\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,47 +17,47 @@ msgstr ""
 "Content-Type: text/plain; charset=CHARSET\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: xllmnrd/xllmnrd.cpp:255
+#: xllmnrd/xllmnrd.cpp:289
 #, c-format
 msgid "Try '%s --help' for more information.\n"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:266
+#: xllmnrd/xllmnrd.cpp:300
 #, c-format
 msgid "Usage: %s [OPTION]...\n"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:267
+#: xllmnrd/xllmnrd.cpp:301
 #, c-format
 msgid "Respond to IPv6 LLMNR queries.\n"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:269
+#: xllmnrd/xllmnrd.cpp:303
 msgid "run in foreground"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:270
+#: xllmnrd/xllmnrd.cpp:304
 msgid "record the process ID in FILE"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:271
+#: xllmnrd/xllmnrd.cpp:305
 msgid "display this help and exit"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:272
+#: xllmnrd/xllmnrd.cpp:306
 msgid "output version information and exit"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:274
+#: xllmnrd/xllmnrd.cpp:308
 #, c-format
 msgid "Report bugs to <%s>.\n"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:280
+#: xllmnrd/xllmnrd.cpp:314
 msgid "(C)"
 msgstr ""
 
-#: xllmnrd/xllmnrd.cpp:281
+#: xllmnrd/xllmnrd.cpp:315
 #, c-format
 msgid ""
 "This is free software: you are free to change and redistribute it.\n"